Metal tubes are heated with steam. The linear expansion of three different metals is determined with the aid of a rotating-shaft pointer. From this the metals' coefficient of linear expansion is determined (Supplementary problem). The use of a rolling-shaft pointer is ...
One end of a U-shaped metal rod is immersed in boiling water and the other in cold water. From the warming of the cold water qualitative and quantitative statements can be made about the influence of the rod's composition, length and diameter on the heat flow through it. Since ...
A polished and a black beaker are heated by radiation. Instead of solar radiation a bright flame located in front of the two beakers is used. Both beakers are filled with air since the heat capacity of water is very large and it would be too slowly heated.
Tasks
What kind ...
A measured quantity of water is heated with a heating coil. The electrical heat output is determined. From the temperature increase and the heat energy, the specific heat capacity of water is calculated. This calculation is performed under point 6 of "Evaluation", i.e. ...
Principle
A solid changes its geometrics under influence of heat, the effect is called heat expansion. In this experiment different metal tubes are heated with steam to investigate their linear expansion. The linear expansion is made visual by a rotating shaft with a pointer, over which ...
When fluids or gases are heated, convection occurs. The warmed medium rises due to its smaller density. A circulation tube is filled with water and heated on one side. A drop of food color makes the stream visible. Heat convection in air is demonstrated with a spiral over a ...
By means of the model apparatus for kinetic theory of gases the motion of gas molecules is simulated and the velocities determined by registration of the throw distance of the glass balls. This velocity distribution is compared to the theoretical Maxwell- Boltzmann ...
Principio
Una sustancia gaseosa en condiciones normales se encierra en un volumen variable y se mide la variación de la presión con el volumen a diferentes temperaturas. El punto crítico se determina graficamente con las gráficas (plots) de las ...
A stream of gas is fed to a throttling point, where the gas (CO2 or N2) undergoes adiabatic expansion. The differences in temperature established between the two sides of the throttle point are measured at various pressures and the Joule-Thomson coefficients of the gases in ...
Heated specimens are placed in a calorimeter filled with water at low temperature. The heat capacity of the specimen is determined from the rise in the temperature of the water.
Benefits
The high-pressure steam apparatus makes it possible to measure steam pressure in a temperature range of 100-250 °C. This allows for investigations to be performed on real gases and vapours. Typical equilibrium states between gas and liquid phases can be set up. For this ...
According of Stefan-Boltzmann's law, the energy emitted by a black body per unit area and unit time is proportional to the power "four" of the absolute temperature of the body. Stefan-Boltzmann's law is also valid for a so-called "grey" body whose surface shows a ...
De acuerdo a la ley de Stefan-Boltzmann, la energía emitida por un cuerpo negro por unidad de área y unidad de tiempo es proporcional a la cuarta potencia de la temperatura absoluta del cuerpo. La ley de Stefan-Boltzmann es también válida para ...
In a PEM electrolyser, the electrolyte consists of a proton-conducting membrane and water (PEM = Proton-Exchange-Membrane). When an electric voltage is applied, hydrogen and oxygen are formed. The PEM fuel cell generates electrical energy from hydrogen and oxygen. The electrical ...
PHYWE presenta la nueva unidad de rayos X: tecnología innovadora, máxima seguridad y comodidad.
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